This isn't a guide on how to gain mass, this is a guide on how to become STRONG. To be more specific, I'm talking about increasing your maximal strength.
Maximal Strength on a Lift = The maximum weight you can lift for one Repetition.
Choose a compound lift you want to be OWN in the gym. Some examples of compound exercises are:
Deadlift
Squat
Power Clean
Front Squat
Bench press
Choose one lift such as the deadlift and stick to that lift, you can always go to other compound lifts after your satisfied with the poundage your hoisting in the deadlift.
The secret of gaining strength, is low volume and high frequency. Low volume meaning, low number of sets and reps with heavy weights. High frequency meaning doing the exercise many times a week.
Start with 5 sets and 5 reps if your a beginner. Do the chosen exercise once a week until you start to plateau.
This is to build up you initial strength and capacity.
After couple of weeks add another day of deadlifting in. So you would be deadlift twice a week. To prevent yourself from overworking you should reduce the reps performed to 3 reps instead of 5.
Do the same as before and change the reps and sets to 3x3 once gains are not consistent.
Don't perform to failure. This is to gain STRENGTH not mass. always chose a weight that leaves a rep or two in the bank.
Failure is only allowed on the last set.
so to summarise so far:
5x5 performed on ONE day: for the initial first few weeks
3x5 performed on TWO days: After you notice non consistent gains on 5x5
3x3 performed on THREE days: After you notice non consistent gains on 3x5
After a while, when gains really start to slow down, go back to 5x5 and start the cycle again.
In two years this program can get you deadlifting 400lb. This requires consistent effort from you and sound judgement as well. Make sure technique is perfect before you start adding weight. If possible ask the STRONG people at your gym.